Adjustable radiator cowling



Aug. 18, 1925- F 3 1 I J W. H- BARLING ADJUSTABLE RADIATOR COWLING Filed Jqne 18. 1924 2 Sheets-Sheet 1 11v VENTOR MItcrEBar/fzy a g I W%W7A TTORNEY Aug. 18, 1925. 1,550,417

. W. H. BARLING ADJUSTABLE RADIATOR COWLING Filed June 18, 1924 2 Sheets-Sheet 2 Tia/(6r I]. Bar/111 0 INVENTOR operating these shutters.

Patented Aug. 18, 1925.

. UNITED STATES 1 1,550,417 PATENT OFFICE."

WALTER H. BARLING, or DAYTON, onto.

ADJUSTABLE RADIATOR COWLING.

1 Application filed Tune 18, 1924. Serial No. 720,834.

and more particularly to the provision of adjustable shutters in the forward part of the streamline cowling with means for One object of this invention is the streamlinin to ether of two longitudinally spaced motors, uel tanks therebetween and radiators on each side of the same.

The second object is the provision of a cowling for a radiator, the forward part of which is of a streamline form and composed of a series of angularly related shutters so that they may be opened to permit the enof the aircraft.

trance of air for cooling eifect, or more or less closed to improve the streamlining and reduce the cooling effect on the radiator.

Other objects and advantages will be more fully set forth in the attached specification, in the claims, and in the drawings, in which:

Fig. 1 is a plan view illustrating the position of the apparatus in a motor nacelle unit. i

Fig. 2 is a perspective view of an airplane embodying a number of such streamlined nacelles, and

Fig. 3 is a detailed view of the adjustable shutter mechanism.

Referring. to the drawing more particularly by reference numerals, an ordinary fuselage 1 is provided with the customary planes 2, landing. gear 3, and steering surfaces 4. As apropelling agent, the aircraft is provided with a plurality of motor nacelles designated 5, two of which are shown on each side of the longitudinal axis Each motor nacelle 5 contains a front and a rear motor 6 and 7 respectively, driving front and rear propellers 8 and 9, respectively.- The two motors arelongitudinally spaced and two tanks are mounted in this space which may contain the lubricating, oil or the fuel oil forthe motors. Preferably, each tank is connected to one motor onl and is not connected with the system for t e other motor so that each of the motor units will be independent.

Spaced laterally from the longitudinal axis or medial plane of the motors and mounted one on each-side thereof are two radiators 10 and 11 extending vertically adjacent the rear part of the front motor, as shown, and closing the radiators, tanks, the rear part of the front motor, and the forward part of the rear motor, is a oowling designated generally 12, extending vertically a distance equal to the over-all height of the motor nacella' The two sides of the cowling 12 are joined together at the top and the bottom by streamlining members 13 so that the entire assembly is a unitary structure having small parasitic resistance or drag.

The front part of the cowling is composed of a series of adjustable shutters consisting of the shutters 14, to 18' inclusive, which are mounted on vertical parallel pivots 19.

These shutters are angula-rly related as shown in Fig. 3 so that they extend forwardly and inwardly from the front part of the radiator-defining a streamline nose curvature when the shutters are closed or in their wind deflecting positions. a Each shutter is attached to a link member 20 in a rigid manner so as to be rotated'thereby and these link members are all connected to an inter-connectingmember or bar 21 which is operated by means of the lever 22 through manually operated means 23 of any desired nature. Since all of theshutters are at a different angle of incidence to the line of ,fiight when in their closed or wind-deflect ing position, it is necessary to operate these shutters various amounts,-depending upon their position in the streamline curve and this matter is taken'care of by. the. manner in which the links 20 vary in length, so

that when the manual operating means 23' is adjusted, the shutters may assumeafore and aft position parallel to the slipstream as shown in the left hand side of Fig. l or may assume any intermediate partly opened position. When in the open position, the air has a free entrance and passes through the radiator in order to cool the same.

smooth passage for theair after it leaves the radiator is provided by formers 25' which extend vertically and guide the air It is then discharged out through the rear end of the cowling through lonvers 24. A-

resistance is provided for the passage of the motor nacelle through the air, and of course a minimumcooling effect is also provided for the radiators or other cooling medium with which the motors are supplied. lVhen the blades are very slightly opened, air is permitted to flow to the radiator in order to provide some cooling effect, butthe general streamline nose is still maintained, and the resistance of the nacelle is not materially increased. This position corresponds to the high speed flying position after the airplane has ascended to the desired level or elevation. At this time, it is not desired to provide any great cooling effect for the radia-.

tors and it is important to provide streamlining for such a condition of flight when the speed is great and the plane is under its normal operating flying conditions. When the blades are fully opened, the air passes directly through the nacelle for a maximum cooling effect. The speed of the plane is cut down to some extent due to increased drag or resistance, but this decrease in speed occurs at a time when the maximum is not particularly desirable. The fully opened position of the shutters. is desirable only at such times as when the airplane is climbing or in starting from the ground. The speed of the plane is comparatively small at those times, and the streamlining effect is not particularly desirable then.

I am aware that my invention is capable of various adaptations and uses, and I do not desire to be restricted to the precise embodiment that I have used for the purpose of illustration.

I claim:

1. A motor nacelle for large aircraft comprising in combination, a plurality cf longitudinally spaced motors, a radiator on each side of the motors and spaced from the medial plane thereof and a cowling enclosing said radiators and parts of said motors in a general streamline shape, said cowling having a length ofapproximately the combined length ofgthe said motors.

2. A motor nacelle for large aircraft comprising in combination, a plurality of longitudinally positioned motors, a radiator on each side of the medial plane thereof and between the motors, a tank between the motors, and a cowling enclosing said radiators, tank, and parts of said motors in a general streamline shape.

A motor nacelle for large aircraft comprising in combination a plurality of longitudinally positioned motors, a radiator on each side of the medial plane thereof, and between the motors, a tank between the motors, and a cowling enclosing said radiators, tank, and parts of said motors in a general streamline shape, said cowling including a series of ad acent pivoted wind deflecting members, and means for simultaneously operating the members of said series through different predetermined angles.

4. A motor nacelle for large aircraft cornprising in combination, a plurality of longitudinally positioned spaced motors, a radiator on each side of the medial plane thereof, and located closeto the rear end of the front motor, a plurality of tanks between the motors, a cowling enclosing said radiators, tanks, the rear end of the front motor and the front end of the rear motor, in a general streamline shape, said cowling including a plurality of angularly related pivoted wind deflecting members at the front thereof, means for simultaneously operating said members through different predetermined angles for varying the cooling effect on the radiators, and a former for the sides of the tanks to deflect the air outwardly.

5. A motor nacelle for large aircraft comprising a plurality of longitudinally spaced motors, cooling means therefor located therebetween, a streamline casing for said cooling means and parts of said motors, said casing including a series of adjoining pivoted wind deflecting members forming when closed a forward part of one side of the streamline form, and means for simultaneously operating said members on their pivots.

6. In an aircraft in combination, a motor, a cooler therefor, and a streamline cowling for said cooler, said cowling including a plurality of pivoted wind deflectors mounted on parallel axes, said axes defining a part of the streamline shape, and means for simultaneously pivoting the deflectors.

7. In an aircraft in combination, a motor,

a cooler therefor, and a streamline cowling for said cooler, said cowling including a plurality of angularly related pivoted wind deflectors mounted on parallel axes, said axes partly defining a streamline shape, a link for moving each deflector, and means connecting said links for simultaneous operation so that the deflectors are simultaneously moved various amounts to assume positions parallel with the slipstream.

8. In an aircraft in combination, a motor, a radiator therefor, and a streamline cowling for said radiator including a plurality of pivoted shutters mounted on vertical parallel axes, said axes defining the. forward streamline shape, and means for simultaneously pivoting said shutters through relatively different angles, the angular movement thereof depending upon the fore and aft location thereof.

9. In an aircraft, in combination, a radiator therefor, said radiator comprising a number of pivoted shutters having their pivot axes arranged in a line curved inwardly and forwardly, and means for simultaneously a motor,-

operating all of said shutters varying varying amounts, said-means comprising a 10 amounts. series of links of diiferent lengths connected 10. In an aircraft, in combination,- a to said shutters, and means interconnecting motor, a cooler therefor, and a front cowlsaid links so that all of said shutters may ing for said cooler comprising a number assume parallel positions to the slipstream of pivoted shutters having theirpivot axes in their fully opened positions.- arranged vertically in a surface curved in- In testimony whereof I afiix my signawardly and forwardly, and means for simulture. taneously operating all of said shutters \VALTER H. BARLING. 

